This is my first time using LetsEncrypt and I’m hitting what I assume is a dumb issue but I can’t resolve it.

I’m using the ACME module in pfSense to request a cert for my new domain. The domain is registered with Google Domains and delegated to Dyn Managed DNS nameservers. The domain resolves fine and I’m able to access it. Whois records are fine as well. I’ve generated my account key and registed it to letsencrypt-production-2. I’m now trying to issue the certificate. I’ve tried using multiple methods but the current one is “DNS-Dyn.com”. I’ve supplied my dyn customer ID as well as my API username and password. The API account is the account owner so there shouldn’t be any permissions issues. When I click “Issue” I get the following. (Note that I’ve scrubbed sensitive data and replaced it with ) I’m running pfSense 2.4.3.